55551545 has 12 divisors (see below), whose sum is σ = 77545764. Its totient is φ = 38092320.

The previous prime is 55551493. The next prime is 55551547. The reversal of 55551545 is 54515555.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37258816 + 18292729 = 6104^2 + 4277^2 .

It is not a de Polignac number, because 55551545 - 2⁸ = 55551289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55551547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113126 + ... + 113615.

It is an arithmetic number, because the mean of its divisors is an integer number (6462147).

Almost surely, 2^55551545 is an apocalyptic number.

It is an amenable number.

55551545 is a deficient number, since it is larger than the sum of its proper divisors (21994219).

55551545 is a wasteful number, since it uses less digits than its factorization.

55551545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226760 (or 226753 counting only the distinct ones).

The product of its digits is 62500, while the sum is 35.

The square root of 55551545 is about 7453.2908838982. The cubic root of 55551545 is about 381.5622320834.

The spelling of 55551545 in words is "fifty-five million, five hundred fifty-one thousand, five hundred forty-five".